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Added a trivial program to randomly corrupt RDB files in /utils.
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/* Trivia program to corrupt an RDB file in order to check the RDB check | ||
* program behavior and effectiveness. | ||
* | ||
* Copyright (C) 2016 Salvatore Sanfilippo. | ||
* This software is released in the 3-clause BSD license. */ | ||
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#include <stdio.h> | ||
#include <fcntl.h> | ||
#include <sys/stat.h> | ||
#include <stdlib.h> | ||
#include <unistd.h> | ||
#include <time.h> | ||
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int main(int argc, char **argv) { | ||
struct stat stat; | ||
int fd, cycles; | ||
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if (argc != 3) { | ||
fprintf(stderr,"Usage: <filename> <cycles>\n"); | ||
exit(1); | ||
} | ||
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srand(time(NULL)); | ||
cycles = atoi(argv[2]); | ||
fd = open("dump.rdb",O_RDWR); | ||
if (fd == -1) { | ||
perror("open"); | ||
exit(1); | ||
} | ||
fstat(fd,&stat); | ||
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while(cycles--) { | ||
unsigned char buf[32]; | ||
unsigned long offset = rand()%stat.st_size; | ||
int writelen = 1+rand()%31; | ||
int j; | ||
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for (j = 0; j < writelen; j++) buf[j] = (char)rand(); | ||
lseek(fd,offset,SEEK_SET); | ||
printf("Writing %d bytes at offset %lu\n", writelen, offset); | ||
write(fd,buf,writelen); | ||
} | ||
return 0; | ||
} |